<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #out{
            
        }
        #one {
            height: 200px;
            width: 200px;
            background-color: aliceblue;
            float: left;
        }

        #two {
            height: 300px;
            width: 300px;
            background-color: aqua;
            float: left;
        }

        #three {
            height: 600px;
            width: 600px;
            background-color: blueviolet;
            float: left;
        }

        #four {
            height: 500px;
            width: 500px;
            background-color: cadetblue;
        }
    </style>
</head>

<body>
    <div id="out">
        <div id="one">one</div>
        <div id="two">two</div>
        <div id="three">three</div>
        <div id="four">four</div>
    </div>
</body>

</html>